Tests delete raises error if document node is matched.
Test ab-delete-021.xml is expected to fail with error code err:XC0023 [Core steps, XProc]
.
<p:declare-step xmlns:err="http://www.w3.org/ns/xproc-error" xmlns:p="http://www.w3.org/ns/xproc" version="3.0">
<p:output port="result"/>
<p:delete match="/">
<p:with-input>
<doc/>
</p:with-input>
</p:delete>
</p:declare-step>
Added test for the new "do not match document node" ruling.